84, Charing Cross Road is a 1970 book by Helene Hanff, later made into a stage play, television play, and film, about the twenty-year correspondence between the author and Frank Doel, chief buyer of Marks & Co antiquarian booksellers, located at the eponymous address in London, England.

Helene Hanff was an American writer born in Philadelphia, Pennsylvania. She is best known as the author of the book 84, Charing Cross Road, which became the basis for a stage play, television play, and film of the same name.